safestring.cpp
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- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: safestring.cpp,v 1.4.8.3 2004/07/09 01:45:47 hubbe Exp $
- *
- * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file,
- * are subject to the current version of the RealNetworks Public
- * Source License (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the current version of the RealNetworks Community
- * Source License (the "RCSL") available at
- * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
- * will apply. You may also obtain the license terms directly from
- * RealNetworks. You may not use this file except in compliance with
- * the RPSL or, if you have a valid RCSL with RealNetworks applicable
- * to this file, the RCSL. Please see the applicable RPSL or RCSL for
- * the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL") in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your version of
- * this file only under the terms of the GPL, and not to allow others
- * to use your version of this file under the terms of either the RPSL
- * or RCSL, indicate your decision by deleting the provisions above
- * and replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient may
- * use your version of this file under the terms of any one of the
- * RPSL, the RCSL or the GPL.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the
- * portions it created.
- *
- * This file, and the files included with this file, is distributed
- * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
- * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS
- * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
- * ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #include "hxtypes.h" /* for UINT32 */
- #include "safestring.h"
- #include "hlxclib/stdio.h" // vsnprintf()
- char* SafeStrCpy(char* pDestStr, const char* pSourceStr, UINT32 ulBufferSize)
- {
- // Validate parameters and if invalid just return pDestStr like strncpy does.
- if (pDestStr && pSourceStr && ulBufferSize)
- {
- // strncpy does not NULL terminate if ulBufferSize is less than or equal to the source string length. Always make
- // sure the string is NULL terminated.
- strncpy(pDestStr, pSourceStr, ulBufferSize); /* Flawfinder: ignore */
- pDestStr[ulBufferSize-1] = ' ';
- }
- return pDestStr;
- }
- char* SafeStrCat(char* pDestStr, const char* pSourceStr, UINT32 ulBufferSize)
- {
- // Validate parameters and if invalid just return pDestStr like strcat does.
- if (pDestStr && pSourceStr && ulBufferSize)
- {
- // Find the end of the destination string just like strcat does
- char* pDestStrEnd = pDestStr;
- while (*pDestStrEnd)
- {
- pDestStrEnd++;
- }
- UINT32 ulDestStrLength = pDestStrEnd - pDestStr;
- // If the length of the destination string is longer than the buffer size then we cannot concatenate anything
- if (ulDestStrLength < ulBufferSize)
- {
- // We have room to concatenate so figure out how much of the buffer contained in the destination string we
- // can use and copy the source string in.
- SafeStrCpy(pDestStrEnd, pSourceStr, ulBufferSize - ulDestStrLength);
- }
- }
- return pDestStr;
- }
- int SafeSprintf(char* pBuffer, UINT32 ulBufferSize, const char* pFormatStr, ...)
- {
- int nCharsWritten = 0;
- // Validate parameters and if invalid just return 0.
- if (pBuffer && ulBufferSize && pFormatStr)
- {
- va_list argptr;
- va_start(argptr, pFormatStr);
- nCharsWritten = vsnprintf(pBuffer, ulBufferSize, pFormatStr, argptr);
- pBuffer[ulBufferSize-1] = ' ';
- va_end(argptr);
- }
- return nCharsWritten;
- }